8.Locate and guard vent termination to prevent acci- dental contact by people or pets.
9.DO NOT terminate vent in window well, stairwell, alcove, courtyard or other recessed area.
10.DO NOT terminate above any door, window, or gravity air intake. Condensate can freeze, causing ice formations.
11.Locate or guard vent to prevent condensate from damaging exterior finishes. Use a
12.DO NOT extend exposed vent pipe outside of building. Condensate could freeze and block vent pipe.
U.S. Installations
Refer to the latest edition of the National Fuel Gas Code.
Vent termination requirements are as follows:
1.Vent must terminate at least 4 ft below, 4 ft hori- zontally from or 1 ft above any door, window or gravity air inlet to the building.
2.The vent must not be less than 7 ft above grade when located adjacent to public walkways.
3.Terminate vent at least 3 ft above any forced air inlet located within 10 ft.
4.Vent must terminate at least 4 ft horizontally, and in no case above or below unless 4 ft horizontal distance is maintained, from electric meters, gas meters, regulators, and relief equipment.
5.Terminate vent at least 6 ft away from adjacent walls.
6.DO NOT terminate vent closer than 5 ft below roof overhang.
7.The vent terminal requires a 12 in. vent terminal clearance from the wall.
8.Terminate vent at least 1 ft above grade, including normal snow line.
9.Multiple direct vent installations require a 4 ft clearance between the ends of vent caps located on the same horizontal plane.
Canadian Installations
Refer to latest edition of B149 Installation code.
A vent shall not terminate:
1.Directly above a paved sidewalk or driveway which is located between two
2.Less than 7 ft (2.13 m) above a paved sidewalk or paved driveway located on public property.
3.Within 6 ft (1.8 m) of a mechanical air supply inlet to any building.
4.Above a meter/regulator assembly within 3 ft (915
mm)horizontally of the vertical
5.Within 6 ft (1.8 m) of any gas service regulator vent outlet.
6.Less than 1 ft (305 mm) above grade level.
7.Within the 3 ft (915 mm) of a window or door which can be opened in any building, any
8.Underneath a verandah, porch or deck, unless the verandah, porch or deck is fully open on a mini- mum of two sides beneath the floor, and the distance between the top of the vent termination and the underside of the verandah, porch or deck is greater than 1 ft (305 mm).
Changing the Flue Outlet
Follow these instructions to change the flue connec- tion from the standard top location to the rear of the heater (with optional flue exhaust tee).
1.Disconnect all electrical power from the heater (if applicable).
2.Disconnect or isolate the main gas pipe from the heater (if applicable).
3.Remove the screws, gasket and dustcover from the rear of the heater.
4.Remove the screws, stainless steel flue cover and gasket from the branch side of the tee located in the flue box at the rear of the heater.
27
